Log InRegister
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreOur ScienceMindat Newsletter [Free Download]Contact Us
Donate to MindatSponsor a PageCorporate SponsorshipSponsored Pages
Learning CenterWhat Is a Mineral?The Most Common Minerals on EarthInformation for EducatorsMindat ArticlesMindat Newsletter [Free Download]The ElementsThe Mineral Quiz
Search FormMinerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDMinerals by CountryAlphabetical Mineral IndexAlphabetical Locality SearchMineral Association SearchList of CountriesLocalities Near MePhoto SearchSearch ArticlesSearch GlossaryThe Rock H. Currier Digital LibraryMore Search Options
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
MineralsPetrologyFossilsMeteoritesGeologic Time
Mining CompaniesStatisticsMineral MuseumsClubs & OrganizationsMineral Shows & EventsDevice SettingsTime Machine
Read DiscussionsIdentification Request
Photo SearchPhoto GalleriesSearch by ColourPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Clark Mine Group, Highland area, Iowa County, Wisconsin, USAi
Regional Level Types
Clark Mine GroupGroup of Mines
Highland areaMining Area
Iowa CountyCounty
WisconsinState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearchMineralogy
Latitude & Longitude (WGS84):
43° North , 90° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~2km
GRN:
N29W48
Type:
Group of Mines
Köppen climate type:
Dfb : Warm-summer humid continental climate
Mindat Locality ID:
250000
Long-form identifier:
mindat:1:2:250000:6
GUID (UUID V4):
0


These mines all worked the same ore body, which bore copper, as well as the usual lead-zinc ore. They all worked between 1900 and 1920. The ore was in disseminations and pitch and flat structures in the Ordovician carbonate rocks of the Decorah Formation. Secondary oxidation produced a host of interesting copper and zinc minerals.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

17 valid minerals.

Detailed Mineral List:

ⓘ Aurichalcite
Formula: (Zn,Cu)5(CO3)2(OH)6
ⓘ Azurite
Formula: Cu3(CO3)2(OH)2
ⓘ Calcite
Formula: CaCO3
Localities: Reported from at least 6 localities in this region.
ⓘ Chalcocite
Formula: Cu2S
ⓘ Chalcopyrite
Formula: CuFeS2
Localities: Reported from at least 6 localities in this region.
ⓘ Cuprite
Formula: Cu2O
ⓘ Cuprite var. Chalcotrichite
Formula: Cu2O
ⓘ Dolomite
Formula: CaMg(CO3)2
Localities: Reported from at least 6 localities in this region.
ⓘ Galena
Formula: PbS
Localities: Reported from at least 6 localities in this region.
ⓘ Goethite
Formula: Fe3+O(OH)
ⓘ Malachite
Formula: Cu2(CO3)(OH)2
ⓘ Marcasite
Formula: FeS2
ⓘ Pyrite
Formula: FeS2
Localities: Reported from at least 6 localities in this region.
ⓘ Pyromorphite
Formula: Pb5(PO4)3Cl
ⓘ Quartz
Formula: SiO2
Localities: Reported from at least 6 localities in this region.
ⓘ Smithsonite
Formula: ZnCO3
Localities: Reported from at least 6 localities in this region.
ⓘ Sphalerite
Formula: ZnS
Localities: Reported from at least 6 localities in this region.
ⓘ Tenorite
Formula: CuO

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘChalcocite2.BA.05Cu2S
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘGalena2.CD.10PbS
ⓘPyrite2.EB.05aFeS2
ⓘMarcasite2.EB.10aFeS2
Group 4 - Oxides and Hydroxides
ⓘGoethite4.00.Fe3+O(OH)
ⓘCuprite
var. Chalcotrichite		4.AA.10Cu2O
ⓘ4.AA.10Cu2O
ⓘTenorite4.AB.10CuO
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘSmithsonite5.AB.05ZnCO3
ⓘDolomite5.AB.10CaMg(CO3)2
ⓘAzurite5.BA.05Cu3(CO3)2(OH)2
ⓘMalachite5.BA.10Cu2(CO3)(OH)2
ⓘAurichalcite5.BA.15(Zn,Cu)5(CO3)2(OH)6
Group 8 - Phosphates, Arsenates and Vanadates
ⓘPyromorphite8.BN.05Pb5(PO4)3Cl

List of minerals for each chemical element

HHydrogen
Hⓘ Aurichalcite(Zn,Cu)5(CO3)2(OH)6
Hⓘ AzuriteCu3(CO3)2(OH)2
Hⓘ GoethiteFe3+O(OH)
Hⓘ MalachiteCu2(CO3)(OH)2
CCarbon
Cⓘ Aurichalcite(Zn,Cu)5(CO3)2(OH)6
Cⓘ AzuriteCu3(CO3)2(OH)2
Cⓘ CalciteCaCO3
Cⓘ DolomiteCaMg(CO3)2
Cⓘ MalachiteCu2(CO3)(OH)2
Cⓘ SmithsoniteZnCO3
OOxygen
Oⓘ Aurichalcite(Zn,Cu)5(CO3)2(OH)6
Oⓘ AzuriteCu3(CO3)2(OH)2
Oⓘ CalciteCaCO3
Oⓘ Cuprite var. ChalcotrichiteCu2O
Oⓘ CupriteCu2O
Oⓘ DolomiteCaMg(CO3)2
Oⓘ GoethiteFe3+O(OH)
Oⓘ MalachiteCu2(CO3)(OH)2
Oⓘ PyromorphitePb5(PO4)3Cl
Oⓘ QuartzSiO2
Oⓘ SmithsoniteZnCO3
Oⓘ TenoriteCuO
MgMagnesium
Mgⓘ DolomiteCaMg(CO3)2
SiSilicon
Siⓘ QuartzSiO2
PPhosphorus
Pⓘ PyromorphitePb5(PO4)3Cl
SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ ChalcociteCu2S
Sⓘ GalenaPbS
Sⓘ MarcasiteFeS2
Sⓘ PyriteFeS2
Sⓘ SphaleriteZnS
ClChlorine
Clⓘ PyromorphitePb5(PO4)3Cl
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ DolomiteCaMg(CO3)2
FeIron
Feⓘ ChalcopyriteCuFeS2
Feⓘ GoethiteFe3+O(OH)
Feⓘ MarcasiteFeS2
Feⓘ PyriteFeS2
CuCopper
Cuⓘ Aurichalcite(Zn,Cu)5(CO3)2(OH)6
Cuⓘ AzuriteCu3(CO3)2(OH)2
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ ChalcociteCu2S
Cuⓘ Cuprite var. ChalcotrichiteCu2O
Cuⓘ CupriteCu2O
Cuⓘ MalachiteCu2(CO3)(OH)2
Cuⓘ TenoriteCuO
ZnZinc
Znⓘ Aurichalcite(Zn,Cu)5(CO3)2(OH)6
Znⓘ SmithsoniteZnCO3
Znⓘ SphaleriteZnS
PbLead
Pbⓘ GalenaPbS
Pbⓘ PyromorphitePb5(PO4)3Cl

Localities in this Region

USA

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Heyl, Allen V., Agnew, Allen F., Lyons, Erwin J., Behre, Charles H., Flint, Arthur E. (1959) The Geology of the Upper Mississippi Valley Zinc-Lead District. Professional Paper 309. US Geological Survey doi:10.3133/pp309 pp.286-287
Quick NavTopMineral ListLocalities in RegionOther RegionsReferences
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: October 21, 2026 07:14:58 Page updated: July 25, 2026 17:35:12
Go to top of page